PoE vs Low Voltage Power Supplies Cost Compared

Author: John Honovich, Published on Jan 23, 2011

In this note, we contrast the cost of powering cameras via Power over Ethernet vs a non-powered switch plus a low-voltage power supply.  Conventional wisdom tells us that powering cameras via UTP cable also carrying data provides great cost savings.  Rarely, however, do we see costs comparisons from anyone but PoE manufacturers.  To that end, we examine the economics of various configurations of PoE and low-voltage power supplies.

Factors Driving Costs

** ********** ***** ****** ***** *****, ** **** ********** *** factors ******* **** *** *** **** ***** *** ******** ** the *****.

*** ********* ******* ***** ***:

  • ********** ********* ***** *****. ***** ***** *** *** **** *** UTP ***** ****** *** ***** ************, * *** ******** ********** the **** ** ** **/* ***** *****. ******** ******* **** vary ******* ********* ** (*) *** ****** ** *** ***** needed *** (*) *** ************ *** ******. *** ****** *** cable *** *** *** **** ****** ** ********, *** ******* the ******* *** *** ***. ** ******** ******* ** $* - $** *** ******.
  • ********** * ************ ***** ******. ***** *** ******* ****** **** as * ***** ******, * *** ******** ********** *** **** to ******** * ***-******* ***** ******. ** ******** **** ***** $5 - $** *** ******.
  • ********** ***** ***** ***********. ***** ***** **** **** *** *** UTP ***** ****** *** ***** ************, ** ********** ***** *********** is ********. ** ******** **** ***** $** - $** *** camera (******** ***** ***** ** $**-$*** *** **-** ******* *** termination).

*** ********* ******* ***** ***-******* *****:

  • ****** ***** * **** ***** **** ******. ****** *** ***** to ******** ************* ********* *** **** ** *** ******. ** estimate ******* ** $** - $** *** ******
  • (**) ********** *** *** ** * *** *******. *** ******** can ** ***** *********. ** ******** $** - $** *** camera.

****: *** *** ***** ** ****** ***** ***, ***** **** be ******** ** * ****** (**** ***) ** * ******* (not **** **************). *** ***** **** ********* ** $** - $25 **** *** ** ***** *** *******.

**** ********* *** ******** *** ********* *** **** **** ******* 7.5 ***** *** **** ***** *** ***** **** *** **** deployments **** *** ******* ** ****** ******** **** **** *.* watts (** ** ** *****).

Cost ******* ********

** ****** *** ***** ** **** ***** $** - $** per ****** **** *** ******* ***** ******** - * ****** but **** *******. ******* ******** (** *** ****** *** ** this *****) **** ****** ***** **** *** *********** *** ****** (as ************ ***** ******** ** ********** *****). ***** ******* ******** with ****** ****** ****** ** ************ ***** ****** ***** ****** more **** ********* **** ****** ***** (*.*. *** *** ****** cost ** * ** ****** ***** ****** ** **** ***** than ** * ****** ***** ******).

Detailed ********* **** ***********

*** ***** ***********, ** ***** ******** *** ******, *** ****** **** ****** ** ***** ***** ******** ******* switch ****.  **** **** **** ** *** *** ****** ******** used *** ********** ******* **** *** ***** ** *** *****.  Only * ****** *-**** ***** ****** **.* ***** ** *** ports, **** *** ****** ******** **** *.* *****.  **** *** be * *******, ********* ** *** ***** **** ** *** camera.  *** **** *********** ** *********** ***** ******, *** *********** ***** ************ ******.

*** ***** ********, ** *************, ****** ******* **** *** **** ***** ** *** ******** leader, *** ******* *********.  ** **** **** ******* *** **** of ********* * *** ******* ******* ** * *** ******, another ****** ********** ** *** ********.  ********* **** ********(***** **** ****-********* ****) **** **** *** ***** ***********.  

******* ** **** ****** ** ******* ** ** *****-*****, **** an ******* ****** ** ***’, *** **** **** **** (**** numbers**********) *** **** *** *******. 

***** *** *** ******, *** ******* **** **** ****:

Eight *******

 

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$***

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****: ********** ***** ** ****** ** ***** ***** ***** *** beyond *** ******** ************ ****** - * *** ******. ***-*** will **** *** ******* ********** ***** ***** ** ******* ***** to ** ********** *** **** ****** ** *** *** ******* power ******.

*** * *******, * **** ******* ** $*** ** ***’* favor (***** * *.* **** *** **** ******). ***** * 15 **** *** **** ******* ****** (*** ***** *****-******** ***** $***), *** ******* ***** ****** ** ***** $***.

Sixteen *******

 

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$*,***

$***

$*,***

*** ** *******, * **** ******* ** $*** ** ***’* favor *** ***** * *** ****** (******** ****** **** ** a *.* **** *** **** ********). ****** ** * ****** which ******** **.** ****** *** ***** ******** ****** ** *** Catalyst **** ****, ***** ***** ** * $*,***+ *******.  **** obviously ***** *****-**** ******** **** ******** * **** ********** ******, especially **** *** ***** **** ******** ******** ** ***** ******** are *** ********.

Other ******* ** ********

*********** **** ***** *** ****** ********* *** ***** *****, *** emerges ** **** ****-*********, **** **** *** *******: *** ***** device **** ****** *** *****, *** *** **** *** *********** provide ****** ***** *** ***** ***********.  *** *******, ******* **** heaters/blowers ** ** ************, ** ***** ******* *** ******* ********* low-voltage *******.  *** **** ******** *********** ** ***** ****** ********* and *********** ***********, *** *********** ***** ************ ******.******** **** **** ****-***** ***** ******** **** ****, ****** ****-***** units *** ***** ********* *** ******** ** ************ *** ************** of *********.  **** ****-***** ***** ******** ***** ******* ** ** twice ** **** ** * ********** ****-***** ****, *** *** between *** *** ***-******* ***** ******** ********* *******.  *** ******** drive ** ***** **** *******, ***** *** ****** *** **** equipment *****, ** **** **** ******* ** ********** ***** ****, and ********** **** ** ***** *** ****** ***** ** *** rack.  ** ********* ********* ********* ****** *** ****** ************** ****** simply *********** *** ** **** *** **** ***********.

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